A Measurement-Based Approach for Designing Fixed-Order Controllers for Unknown Closed-Loop Architecture Academic Article uri icon

abstract

  • AbstractThis paper presents a new technique to design fixedstructure controllers for linear unknown systems using a set of measurements. In modelbased approaches, the measured data are used to identify a model of the plant for which a suitable controller can be designed. Due to the fact that real processes cannot be described perfectly by mathematical models, designing controllers using such models to guarantee some desired closedloop performance is a challenging task. Hence, a possible alternative to modelbased methods is to directly utilize the measured data in the design process. We propose an approach to designing structured controllers using a set of closedloop frequencydomain data. The principle of such an approach is based on computing the parameters of a fixedorder controller for which the closedloop frequency response fits a desired frequency response that describes some desired performance indices. This problem is formulated as an error minimization problem, which can be solved to find suitable values of the controller parameters. The main feature of the proposed control methodology is that it can be applied to stable and unstable plants. Additionally, the design process depends on a preselected controller structure, which allows for the selection of loworder controllers. An application of the proposed method to a DC servomotor system is presented to experimentally validate and demonstrate its efficacy.

published proceedings

  • ASIAN JOURNAL OF CONTROL

author list (cited authors)

  • Khadraoui, S., Nounou, H. N., Nounou, M. N., Datta, A., & Bhattacharyya, S. P.

citation count

  • 7

complete list of authors

  • Khadraoui, Sofiane||Nounou, Hazem N||Nounou, Mohamed N||Datta, Aniruddha||Bhattacharyya, Shankar P

publication date

  • March 2016

publisher